Roller-mill.



W. A; DUNN.

ROLLER MILL.

APPLIOATIOI FILED APB.19,1910.

Paienmd Sept. 12,1911.

' 4 SHEETS-BEBE! l W. A. DUNN.

ROLLER MILL.

APPLICATION P1111111 APB..19,1910.

1,002,907, Patented Sept. 12,1911.

4 BHEBTS-SHEET 2.

1111111111111muuunuuuuv Illlll IIIIJ/ 1 M1,, wnmmumumnrgg W. AQ DUNN. ROLLER MILL. APPILIGATIOH rfum APB.19,1910:

Patented Sept. 12,1911.

W. A. DUNN. ROLLER MILL. APPLICATION IfILED A1 3. 19,1910

Patented' Sept. 12, 19 11.

4 SHEETS-SHEET 4.

Smithvillc, in t elevation of. thc""ll an fre 'UNiTEDsTATns arENT WILLIAMA. DUNN, or SMITHVILLE,

MORTON MILLER, 01 DULUTH, MINNESOTA;

l BOLLER-MILL. i

Specification of Letters Patent.

Pam-a1 Sept. 1.2;191 1.

Application filed April 19, 1910. Serial No. 556,389.

To all whom it may concern: i v

Be it known. that l, \Vimnan A; DUNN, a citi en of tho United States, isiding at a county of. St. Louis and State of Minne l a, have invcnted ccrtail'i noiv and r sofii'll llmprovcn' cnls in Roller- Mills, of which the following is at s'pccifica- (ion. l

This invention relates to ii'nprovements in rolliiugmills for the manufacturing of Hlt'cl beams of various Slllll'X-DS.

Tho pres ments on the C(JIlStlllf'lltJ'fi disclosed "in my are for relieving the friction on the 1 rolls; and l overlap the vertical 1] i-o1], which coih'ieratos with the to prcvent the iorn'iation of fins on the beams. I j

The invention also comprehendsimprovements in the specific co ruction and arrangz ei'nent of the rolls whereby I am onto greatly itatitilitatc the n'oduction of beams of variitms shapes;

In the d rawin liignre 1. is a side elevation of a rolling mill constructed in accordance with inv invention. llig. E2 is an elevation of lTl'1lI.,V rticalrolls and their mountinns, part l r 1;: in section.

controlling rolls, an d their njlcmntings. Fig. l is a detail, horizontal, lion on the line 3-3 ofFig. 2. Fig. 5 a dlagrramnnitic View of thc vertical and the web reducing rolls, illustrating an ingot in oncol. its early passes tl'nroua'h the mill." Fig. on a similar View,

the ingot having been shaped into a beam blank. Fig. 7 is a s I onal view of the I'lango controlling: rolls,

showing the shape of the ingot in one of the early passes,

Patent No. ffOfihOSf-l, in that I rn'ovidc a novel same nuli'icrals refer to like parts in ,cllli ini 'ention relatesvto iniprovcover the periphery of the lower web Fig. is an MINNESOTA, ASSIGNOR OF ONE-HALF TO AlTHOL upper Web reducing rolls 2 and 3, and vcrtical rolls l-4, to cooperate with said rolls t2 and 1-3. Spaced from the frames 1, is second set of frames 6, affording i'nonntings t'or an upper horizontal flange controlling roll i. and a lower flange cmitrolhng roll 8.

The flange controlling roll 7 is mounted in bearings 7 provided with adjusting screws 7 on the ends of which. are worm gears 7" meshing with awvorm on a shaft 7. The shaft 7 is geared to receive power from the shaft- 17 so as to adjust the bearings of said flange controlling roll simultancously with the Web reducing roll '3.

The web reducing roll- 2 is of greater length than the Web reducing roll 3, but both said rolls ,are cylindrical throughout their entire length, for thc purpose of fitting snugly a chalmel beam blank. The vertical rolls 4, are each of s epped formation, the enlarged flanged portions 'ooverlyli'ig the peri 'ihery of the horizontal. web reducing r0112, and. the peripheries of the enlarged flanged portions 5 are designed to cooperate with the outer ends of the web reducing roll 3, to confine the outer flange a, of the channel beam to make tl'l"Wl(ltll of the latter nniformn,throughout. By stepping tho-vertical rolls I am enabled to use the web reducing roll 2 to hold the channel beam, and at the same time prevent the spreading; of the metal at the ends of the" ingot. The reduced portions, of the rolls 4" will readily permit of the flanges 5.to"overlie the peri iihery of the'roll 9,,as shown in Figs? and G. Thivcrtical rolls 4 are mounted in yokcs, 8* operating in guides in the frame 1, and connected to sliding blookst) by connections 10. The blocks 9 operate in guides formed in extensions 1.0" on tho frames 1, The blocks 9 are each groovcdon their inner ends to receive two antifriction rollers 11,- ofsub stantially the diameter Ofytllo rolls 4 and located equal distance from a medial line drawn through the center ofthe said rolls 4. By so arranging the antifriction rollers it Will be observed that a seal: is formed for l they may be made of suehsize as will effectually resist the pressure of the metal when passing through the mill.

The sliding blocks 9, are operated by screws, swiveled to the blocks at 1-5, and have at their outer ends worm gears 16, connected through a train of gears with a line shaft 17.

The flange controlling rolls, when it is desired to produce channel beams, are of special construction, to cooperate with the specially formed Web reducing rolls :2 and 3 and the stepped vertical rolls 4. The lower flange controlling roll 8 has a reduced central portion 18, with a cylindrical enlargement 19, at each end, and from the outer ends of these enlargements the roll flares to provide annular inclined surfaces 20, terminating in cylindrical end portions 21. The upper flange controlling roll 7 is reduced at the center, at 2 and inclined from the ends of said reduced portion,'are surfaces 24, ter minating in cylindrical portions 25, which are slightly beveled on their outer edges at 26.- The ingot in passing between the flange controlling rolls 7 and 8 is compressed trar' 'versely as well as vertically. The surfaces 26 and 19 tend to shape the depth of the flange, while the beveled surfaces 20 tend to ,crowd the molecules of metal inwardly to ward the center of the body of the ingot.

1 The beveled surfaces 20 form inclined surfaces a: under the blank which are important when stepped vertical rolls are employed. The outer end surfaces of the upperroll T are located just inside the plane of the juncture lines, formed between the cylindrical portions 19, and the beveled surfaces 20, of the lower 'roll 8, the difference being about equal to the thickness of the flanges of the finished channel beam blank, as! shown in Fig. 8. v

8 indicates side guide bars for the metal. similar to those described in the patent before mentioned.

As stated, when the ingot passes between the flange controlling rolls 7 and 8, the surfaces 20, form inclined surfaces 0 on the bot tom so that when the. outer edges of the ingot come within the plane of action of the peripheries of the flanges of the vertical rolls 4, and the latter compress the metal inwardly, the meta will be compressed or crowded down to the periphery of the Web reducing roll 2, as indicated in dotted lines at yi in Fig. 5. WVere it not for these bevel-surfaces, the metal in being compressed by the ,vertical rolls, would have a tendency to be forced between the enlarged flange portions 5, and the periphery of the roll 2. After the ingot vhas passed through the mill a number of times, so as to reduce it to substantially the width and thicknessrcquired to shape it into a beam, the side pressure exerted by the vertical rolls is not as great as during the previous passes, hence, after the flanges are completely formed, and the bevel surfaces on the bottom side of the ingot have been removed, due to the compression of the metal beyond the beveled surfaces 20 in the previous passes, the liability of the formation of fins is so remote as to remove the questionfrom consideration.

Assumingnow that the ingot is passing through themill, referring particularly to Figs. 5 to 8, in the first pass, shown in Fig. 7, the upper flange'eontrolling roll 7, holds the metal down on the lower flange controlling roll 8, while the inclined or beveled flanges 20 crowd the metal in to form the lateral flanges. The collars on the upper roll 7 and ends of the said lower web reducing roll 2,

in proportion or thereabout to that of the pressure exerted by the horizontal web controlling rolls in the preliminary shaping of the blank. And as before stated, this inward pressure, exerted on the blank crowds the metal in such way' as to take up the space formed by the beveled surfaces on the underside of the blank, and thereby prevents the "formation of fins, and therefore, leaves the edges perfectly sharp or square. In other words, the rolls 4, in acting on the sides of the metal crowd the molecules thereof down on the peri phcry of the supporting roll.

At each subsequent pass of the ingot through the mill, all'the various rolls are simultaneously adjusted by the train of gearsing described in the previous patent, heretofore mentioned.

1. In a mill of the character described,

the combination of a lower web reducing roll, an upper web reducing roll associated" with and. of less width than the lower web reducing roll, a vertically mounted roll adjacent the ends of the upper and lower web reducing rolls, and overlapping the periphcry of the lower Web reducing roll, means for adjusting the vertical rolls,- and two horizontal flange controlling rolls, the lower flange controlling roll having outwardly beveled ends to force the ;ends of the beam inwardly to form' flanges, and the upper flange controlling roll having hubs located above and in the plane of the outwardly beveled ends of the lower roll and adapted to bear on the upper edges of the flanges of a beam, the distance between the periphery oi; the lower web reducing roll and the shaft of the upper web reducing roll being greater than the distance between the lower -flange controlling roll and the hubs of the upper flange controlling roll, whereby the edges of the llangea of a llttllil panning through the mill will not eontaet with the shaft oi the upper web redu'cring roll 2. in a mill ol the eharaeter described, the('rnnhinalion ot'a pairo't horizontal flange eont'ij'olling rolls, the upper one of which is formed with hubs and the lower one oil Which in formed with outwardly inclined annular nurtures whit-h t'orln bevel Htll'ftltth' on the bottom eol'nel's (it an ingot, the dis-- tance between the periplmry ol the lower flange controlling roll and the hubs onthe upper tlal'igecontrolling roll being equal to the depth of the flanges on a beam, wher by said flanges will he gaged, a lower web l'edtming roll, an upg'uu' web ret'lneing roll above the lower web reducing roll (it less width than the lower web redueing roll, the distance between the periphery of the lower web redocii'ig roll and the shaft oi, the up per Web reducing roll being greater than. the distance between the periphery of the lower flange reducing roll and the hubs of the upper flan e controlling roll, a roll each side of and overlapping the periphery of the lower Web reducing, roll means for ad jnsting the vertical rolls toward and from each other the peripheries oi the vertical rolls being spaced from the ends of the up per web reducing rolls to form guides for the end flanges formed on. the metal passing through the mill, whereby the vertical rolls will compress the metal forming the flanges of the beam and fill out the beveled edges formed by the inclined annnliir surfaces on the flange controlling roll and thereby pre vent the formation of fine.

3. In a mill of the class described the combination of a lower flange controlling; roll provided with outwardly beveled anon lar ends extending from the e "lin "l1"ieal por tion of said roll, an upper flange controlling roll having hubs against which the flanges of abeam bear to control the height of said flanges, the outwardly beveled annular ends l l l l l l l i l l l t il l l l oi the. first mentioned l'hu'ige controlling roll being wholly beyond the plane of the inner ends of the hubs oi the upper llange controlling; roll, a lower eylimlriral web reducing roll in alineinent with and substantially equal to the full length oi the lower llai n'e emdrolling roll. an upper eylinth'ira! web reducing roll of less width than the lower eylindrieal web reducing roll, the (listener: bet-ween the hubs oi the upper tlangoeontrolling roll and the periphery ot the lower flange controlling roll being less than the distance between the shaft of the upper web reducing roll and the periphmy oi the lower web rednt'riim roll. two vertit-al nltlt! rolls ad-. jaoent the ends ol the web reducing rolls and overlapping and tilting t'lOHO to the pe riphery of the lower web reducing roll, whereby to rompresa the end llangrees on a beam and to force the metal thereof downwardly on the. periphery ol? the lower eylindrieal web retllueinr roll to destroy the inclined surfaces on the edge of a. beam formed by the annular inclined ends; of the lower flange controlling roll.

Ft. 111 a mill oi the class deserihegl, the eonibinat'ion 0t flange controlling rolls for forn'iing side flanges on beams,- of a pair of web reducing rolls the lower one oi whirl] is of greater length than the upper one, rertieailly dispoeed rolls adjacmit the web redneing rolls, and overlam'iing the periplniry of the lower web redneing' roll the distance between the periphery of the lower web reducing roll and the shaft of the upper web reducing roll being greater than the depth of the flanges; ot a beam termed by the flange controlling rolls, whereby when the \rrtically disposed rolls compress the metal of the flanges the said metal will have suit} oient space to be vertically expanded.

In testimony whereof aliix my signature in presence of two witnesses.

WILLIAM A. DU N N.

Witnesses:

F. L. Bnownn, A. L. WEAVER. 

